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Job #: R-00030166
Location: St. Louis, MO
Category: Systems Administration
Schedule (FT/PT): Full Time
Travel Required: Yes, 25% of the time
Shift: Day
Potential for Telework: Yes
Clearance: Secret
Referral Eligibility: Eligible
Group: Defense

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Job Description:

The Defense Group at Leidos has a career opening for a Systems Administrator located in the Scott AFB, IL (St. Louis, MO) area. There is a potential for telework, however one must live within driving distance to this location as they will need to be in the office as needed.

This system administrator will support the sustainment and ongoing development of the DISA’s Software Defined Networking (SDN) solution, providing Tier III support for server and application infrastructure under general supervision.

•Work independently to ensure the reliability, availability and security of the SDN solution by proactively monitoring the system, troubleshooting, and resolving issues to ensure high availability and continuity of operations
•Be able to work in a fast-paced environment and must be able to work independently
•Maintain configuration management and baseline control of development, test, pre-production and production environments
•Conduct regular security scans, analyze results and implement resolutions including testing of new hardware and software and ensure compliance with DISA STIGs
•Operate and maintain the SDN solution, including patching of operating systems and COTS/FOSS/GOTS
•Perform and test regular backups
•Monitor and tune system and network performance, including RHEL and VMWare systems, for optimal system availability
•Configure, manage and maintain components of the SDN solution (application servers, load balancers, databases, operating systems, etc.)
•Manage, track and maintain configuration items including licenses, SSL certificates and the hardware/software baseline
•Support SDN baseline deployments, upgrades and updates to the production environment including the installation and configuration of new software and hardware
•Create, maintain and implement detailed documentation and maintain standard operating procedures.
•Perform trend analysis on component failures, network/node outages, and system performance parameters
•Interact with software and hardware vendors to evaluate vendor products and make recommendations to purchase hardware and software
•Work with network engineers and developers to troubleshoot environment issues as necessary
•Escalate support issues to vendors as necessary and coordinate resolution
•Manage access including creation and management of user and service accounts
•Provide support on a M-F business hours schedule, also responsible for on-call, extended hour, and weekend support as required by mission or emergency situations

•BS degree and 2 – 4 years of prior relevant experience or Masters with less than 2 years of prior relevant experience; Additional experience, education and training may be considered in lieu of degree
•Experience installing, managing and maintaining RHEL 7 Linux servers in a production environment
•Experience troubleshooting and managing virtualized infrastructure in an VMware ESXi environment
•Experience applying DevOps concepts and tools to automate repetitive tasks and ensure baseline consistency across multiple environments
•Experience deploying, managing, monitoring and maintaining a variety of complex software products across multiple environments, including WildFly/JBoss, MongoDB, Apache Cassandra, HAProxy, etc.)
•Experience with the deployment of McAfee HBSS tools in a Linux environment
•Experience with scripting in Bash and experience in other languages such as Perl or Python
•Thorough knowledge of TCP/IP networking
•Application and configuration of security settings and other IA best practices, such as those as required by DISA STIGs and SRGs
•Experience supporting, installing and configuring enclave Ethernet switches, storage area networks (SAN), and network attached storage (NAS)

•Active Secret with SSBI or Top Secret security clearance
•Current DoD-8570 IAT Level 2 or higher certification (i.e. CompTIA Security+/CE, CASP or CISSP)

•Red Hat Certified System Administrator (RHCSA)/Linux Professional Institute Certification (LPIC)
•Experience managing HPE integrated BladeSystem enclosures, including Onboard Administrator, iLO and interconnect modules
•Experience managing and using Ansible automation tools
•Knowledge of Git and the Git version control model
•Understanding of PostgreSQL, including monitoring, managing and maintaining replicated databases
•Experience supporting, installing and configuring enclave Fiber/Ethernet switches, HPE storage area networks (SAN)/ network attached storage (NAS)
•Experience with a ticketing system such as BMC Remedy and/or Atlassian JIRA
•Experience administering and configuring Windows Server 2012 R2 or higher

External Referral Bonus:


Potential for Telework:


Clearance Level Required:



Yes, 25% of the time

Scheduled Weekly Hours:




Requisition Category:


Job Family:

Systems Administration

About Leidos

Leidos is a Fortune 500® information technology, engineering, and science solutions and services leader working to solve the world's toughest challenges in the defense, intelligence, homeland security, civil, and health markets. The company's 33,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $10.19 billion for the fiscal year ended December 28, 2018. For more information, visit

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [email protected].

Commitment to Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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